1)Multi-Pump Control-Can realize two masters and Max.4 auxiliaries (standby master works as slave) to combine work.

2）There are two masters (one is master,the other is standby master) and 3 slaves. The standby master  replaces the master to command the whole system only when the master  fails to work.The two master drives are both equipped with pressure transducers,the other auxiliary drives are without transducers.

3).All the drives are connected through a RS485 Communication line.

4) The master detects pipe water pressure through pressure transducer,and sends the pressure signal to the auxiliaries and automatically controls the auxiliaries to run or stop and PID status according to the water pressure condition.

5) When master drive failes to work, the standby master will automatically replace the master to controls the whole system; when any auxiliary drive fails to work, the system will just skip it by and start the next one, ensuring the automatic shift of pump group.

6) The pumps run alternately (8hours by default) to balance every pump’s running time to prolong service life of the whole unit machine.

2. Operating steps for multi-pump system

 1) Set target pressure on master drive

At Stop status, directly press               or             ( do not need to enter U parameter group) and hold for 3 seconds,then set the target pressure.. 

2)Set sensor type and sensor range on master and standby drive.

Function Code Description Set range Unit Default Modification Level Note

U0-03 Sensor type 0:  (0-10)

1:  (4-20)

5:  (4-20)

V

mA

mA

1 ● 0: V termial

1: C termial

5: C1 terminal

U0-04 Sensor  Range 0.0-60 Bar 10 ○

3)Confirm each pump’s rotation direction

If any pump’s rotation direction is not correct, refer to one of the following 2 ways to change the the rotation direction:

a.Modify U0-02 value 

b.Exchange any two of U/V/W wiring

4)Adjust display pressure

When display smaller than gauge,increase U0-05.When display bigger than gauge,decrease U0-05

5)Parameters setting for pumping system ( master and standby master pump needs to be connected with pressure sensor)

Two pump system : 

Drive type Parameters setting

Master drive 1 U3-03=1,          

Standby drive 2 U0-10=2,U0-13=2,U3-01=2

Three pump system:

Drive type Parameters setting

Master drive 1 U3-03=2

Standby drive 2 U0-10=2,U0-13=2,U3-01=2,U3-03=2

Slave drive 3 U0-10=2,U0-13=2,U3-01=3

Four pump system:

Drive type Parameters setting

Master drive 1 U3-03=3

Standby drive 2 U0-10=2,U0-13=2,U3-01=2,U3-03=3

Slave drive 3 U0-10=2,U0-13=2,U3-01=3

Slave drive 4 U0-10=2,U0-13=2,U3-01=4

Five pump system:

Drive type Parameters setting

Master drive 1 U3-03=4

Standby drive 2 U0-10=2,U0-13=2,U3-01=2,U3-03=4

Slave drive 3 U0-10=2,U0-13=2,U3-01=3

Slave drive 4 U0-10=2,U0-13=2,U3-01=4

Slave drive 5 U0-10=2,U0-13=2,U3-01=5

Note: The screen display on standby and slave drives are running frequency (default setting)

Terminal instruction

Terminal Name Description

DI1,DI2,D3 Digital input

work with COM 

V Analog input ,input : 0~10V, input resistance: 6.8KΩ

C,C1 Analog input, current: 4~20mA, input resistance: 500KΩ

GND Reference zero potential for 5V,10V,24V

10V Output voltage, current:0-100mA

MO Output open terminal,GND as common terminal,external supply:0-24V,current:0-50mA

24V 24V output voltage 

5V 5V output voltage 

TA,TB,TC

TA1,TB1,TC1 Relay output : TA/TC open,     TA/TB closed

TA1/TC1 open,      TA1/TB1 closed 

Contact capacity:   AC250V/3A,DC30V/1A

T/A,T/B,T/C For 0.75-2.2kw,TA/TB constant open,  T/B.T/C constant closed

S+, S- Pump communication

RS485+，RS485- For external monitoring or communication

A01 Output alalog,work with GND to be 0-10v

Control Board Terminal Diagram

Wiring diagram of power board and control board 

Common Alarm Codes And Solutions

Alarm code Alarm Description Possible reasons Solutions

A-01 Water shortage protection 1.low inlet flow.

2.The power of drive is bigger than that of pump,

Water pressure below 0.5bar.

3.U1-01 value is set too big. 1.Increase inlet flow.

2.Modify U1-00 value to be 2.

3.Modify U1-01 value to a small number.

A-02 High water pressure protection 1.Actual pressure exceeds 15bar

2.Transducer malfunction,the readout exceeds 15bar. 1.Modify U1-06 value to a bigger number.

2.Replace the failed transducer .

A-03 Low water pressure protection 1.Pressure below 0.5bar under the normal running status.

2.Pressure below 0.5bar ,the pump rotates reversely.

3.Water consumption is bigger than outlet flow.

4.U1-08 value is set too high. 1.Eliminate the air in the pump.

2.Adjust the rotation direction.

3.Increase the inlet flow

4.Replace with bigger size pump or reduce water consumption.

5.Change the U1-08 value to a small number.

A-04 Low current protection 1.Incoming water shortage.

2.The power of drive is bigger than that of pump.

3.U1-04 Value is set too high 1.Increase incoming water

2.U1-00 value is modified as 2.

3.U1-04 value is modified as a small number.

Fault Information And Trouble Shooting

Fault Code Fault Type Possible Reasons Solutions

E-01 Output Short circuit 1.Output short circuit or connected to ground

2.Too heavy overload 1.Wiring inspection

2.Ask manufacturer for help

E-02 Over current in speed acceleration 1.Acceleration time is too short.

2.Torque boost is too high or V/F curve is not applicable 1.Increase acceleration time

2.Lower torque boost,Increase voltage to adjust V/F curve.

E-03 Over current in speed deceleration Deceleration time is too short Increase deceleration time

E-04

Over current in running

Abrupt load change

Reduce the fluctuation of load

E-05 Software over current The same as E-01,E-02,E-03 The same as E-01,E-02,E-03

E-06 Internal communication problems Hardware problems Ask manufacturer for help

E-07 Grounding faults 1.The output end of drive or motor is connected to ground

2.The drive’s input wire and output wire is connected together 1.Inspect wiring

2.Inspect if the motor has aging problems.

E-08 Over voltage in speed acceleration 1.Too high input voltage

2.Frequently switch on and off Inspect the power and voltage

E-09 Over voltage in speed deceleration 1.Deacceleration  time is too short.

2.Abnormal input voltage 1.Increase deceleration time

2.Inspect the power voltage

3.Use new brake resistor

E-10 Over voltage in running 1.Abnormal input voltage

2.Returned energy load 1.Inspect the power

2.Use new brake resistor

E-14 underload 1.Virtual connection of drive’s output wire 

2.No load 1.Inspect the wiring

2.Inspect load

E-15 Drive overload 1.Too big load

2.Too short acceleration time

3.Torch increases too high or V/F curve not applicable

4.Grid voltage is too low 1.Reduce load or use big power drive

2.Increase acceleration time

3.Lower torque,Increase voltage to adjust V/F curve.

4.Inspect grid voltage

E-16 Motor overload 1.Too big load

2.Too short acceleration time

3.Protection value is too small

4.Torch increases too high or V/F curve not applicable

1.Reduce load or use big power drive

2.Increase acceleration time

3.Increase overload protection value

4.Lower torque,Increase voltage to adjust V/F curve.

E-17 Current detection fault 1.Breakdown of circuit or detecting device.

2.Auxiliary power problems Ask manufacturer for help

E-18

Undervoltage in running

1.Abnormal input voltage

2.Big load starts in power grid

1.Inspect power voltage

2.Supply electricity seperately

E-19 Open terminal external  devices fault External devices fault,Signal from input end

Inspect the signal and its related devices

E-20 Close terminal external devices fault External devices fault,Signal from input end

Inspect the signal and its related devices

E-21 Drive overheating 1.Air passage blocked

2.The environment temperature is too high

3.Fan failed 1.Clean up the air passage

2.Decrease carrier frequency

3.Change fan

E-22 Input phase loss 1.Input voltage phase loss

2.Input voltage is too low 1.Check input wires connection

2.Check grid phase loss

E-23 Output phase loss Poor connection between drive and motor Inspect wiring

E-24 Storage faults Hardware fault Contact manufacturer

E-25 Running time reaches set time Running time reaches set time Seek for service

E-26 PID feedback fault 1.PID feedback signal is lost

2.Transducer is broken

3.Feedback information does not meet setting 1.Check feedback passage

2.Check transducer for problems

3.Verify the correct feedback to meet the setting

E-27 Rs485 fault Data transmitting and receiving mistakes under the serial communication 1.Check wiring

2.Contact manufacturer

E-28 Interference Improper operation caused by the surrounding EMI Use absorption circuit to eliminate the surrounding interference